Results 81 to 90 of about 10,085 (234)
Petrology of blueschist facies metamorphic rocks of the Meliata Unit [PDF]
Acta Montanistica Slovaca, 1997 Meliata blueschists originated from basalts, limestones, pelites, psammitic and amphibolite facies basement rocks. Compositionally, the metabasalts have a geochemical signature mostly indicative of a transitional arc-MORB origin, but some mafic rocks ...
Faryad Shah Wali
doaj
U–Pb Dating of Cambrian Magmatism in the Pinerolo‐Sanfront Unit, Dora‐Maira Massif (Western Alps)
Terra Nova, EarlyView.ABSTRACT The Pinerolo‐Sanfront Unit (PSU), the structurally lowest tectonic unit of the Dora‐Maira Massif (Western Alps), has been regarded as a monocyclic unit composed of Permo‐Carboniferous sediments and Permian granitoids that were metamorphosed during the Alpine orogeny.
Francesco De Cesari +6 more
wiley +1 more source
Photographed by Ron Wolf.Red columnar elbaite crystals on white albite ...
Wolf, Ron
core +1 more source
Encontros Bibli, 2011 Analisa o uso da microfilmagem e da digitalização para a preservação e acesso de documentos em arquivos. Apresenta como algumas instituições internacionais na área estão lidando com a questão.
Sérgio Conde de Albite Silva
doaj
Rapid Communications in Mass Spectrometry, Volume 41, Issue 1, 15 January 2027.ABSTRACT Rationale Nitrogen (N) abundance and isotopic compositions in silicate rocks are commonly measured by sealed‐tube continuous‐flow isotope ratio mass spectrometry (CF‐IRMS), but combustion protocols vary widely. It remains uncertain how the quality of data obtained from different published methods compares for differing sample types. Methods To
Fawn S. M. Holland +4 more
wiley +1 more source
, 1992 The Na/K ratio in geothermal well waters provides a better estimate of the relative stability of low albite and potash feldspar than do predictions from calorimetry and high temperature phase equilibria.
Apps, J. A., Chang, G. M.
core +1 more source
Литосфера, 2018 The object of research. The main goal of the work was to resolve the problem of the existence of rock associations: alkaline granites–syenites–nepheline syenites, which is found on all continents among ancient platforms and stabilized folded regions of ...
Mikhail I. Dubrovsky
doaj +1 more source
Where the Mineral Kingdom Might Hide New Forms of Matter
Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.Abstract Mineralogy has traditionally classified matter primarily through local chemistry and diffraction symmetry. But some physically distinct states of matter differ neither principally in composition nor in obvious diffraction symmetry; they differ in how fluctuations behave over very large distances.
Luca Bindi
wiley +1 more source
High-Pressure Raman spectroscopy on low albite
, 2017 The pressure dependence of the Raman spectrum of low albite, NaAlSi3O8, has been investigated from 0.0001 to 10.4 GPa, at room temperature, on a single crystal compressed hydrostatically in a diamond anvil cell.
MANTOVANI, Luciana +6 more
core +1 more source
A Newly Discovered Tablet‐Making Facility in Nineveh: Insights From Scientific Analysis
Archaeometry, Volume 68, Issue 6, Page 1294-1305, December 2026.ABSTRACT This paper addresses the question of tablet technology in the Neo‐Assyrian capital city of Nineveh. Recent excavations in the lower town of Nineveh by the Iraqi–Italian Archaeological Expedition uncovered an exceptional assemblage of more than 200 tablets from an elite residence that appears to have included a scriptorium.
Mathilde Jean +7 more
wiley +1 more source